Abstract
For most wave energy technology concepts, large-scale electricity production and cost-efficiency require that the devices are installed together in parks. The hydrodynamical interactions between the devices will affect the total performance of the park, and the optimization of the park layout and other park design parameters is a topic of active research. Most studies have considered wave energy parks in long-crested, unidirectional waves. However, real ocean waves can be short-crested, with waves propagating simultaneously in several directions, and some studies have indicated that the wave energy park performance might change in short-crested waves. Here, theory for short-crested waves is integrated in an analytical multiple scattering method, and used to evaluate wave energy park performance in irregular, short-crested waves with different number of wave directions and directional spreading parameters. The results show that the energy absorption is comparable to the situation in long-crested waves, but that the power fluctuations are significantly lower.
Highlights
Ocean waves provide a clean, renewable energy source with a large potential to contribute to the energy demand without negative environmental or climate impact
Common for many of the technologies is that a large-scale electricity production requires that many wave energy converters (WECs) are deployed together in arrays, or parks
Since the devices in the park will interact hydrodynamically by scattered and radiated waves spreading throughout the park, it is of importance to determine the optimal park layout that achieves maximum electricity production with minimum power fluctuations and costs
Summary
Ocean waves provide a clean, renewable energy source with a large potential to contribute to the energy demand without negative environmental or climate impact. There is a large number of different technology approaches for conversion of wave energy to electricity, and very few have reached a commercial maturity. Common for many of the technologies is that a large-scale electricity production requires that many wave energy converters (WECs) are deployed together in arrays, or parks. This is true for the point-absorber concept considered in this study. Since the devices in the park will interact hydrodynamically by scattered and radiated waves spreading throughout the park, it is of importance to determine the optimal park layout that achieves maximum electricity production with minimum power fluctuations and costs. Since the early works on wave energy, studying and optimizing wave energy array layouts have been main topics of interest [1,2,3], and remains an active area of research today [4,5,6,7,8,9]
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